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J. BQPIEROE. Steam-Heater.

No. 228,475. Patented June 8,1880.

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NITED STATES- PATENT OFFICE.

JOHN B. PIERCE, OF BUFFALO, NEW YORK.

STEAM-H EATER.

SPECIFICATION forming part of Letters Patent No. 228,475, dated June 8, 1880.

Application filed J annary 27, 1880. I

To all whom it may concern:

Be it known that I, JOHN B. PIERCE, a citizen of the United States, residing in the city of Buffalo, in the county of Erie, in the State of New York, have invented certain new and useful Improvements in Steam-Heaters, of which the following is a specification.

The object of this invention is to provide a simple and effective means for heating buildin gs by steam; and it consists, first, of a steamheating boiler having the furnace or fire-chamber arranged within it, and provided with a series of tubes leading from the fire-chamber through the top of the boiler and another series of tubes leading from the top down through the bottom, in combination with a supplementary boiler arranged above the main boiler and connected thereto by tubes, the space between them being inclosed by a shell surrounding it, and the whole inclosed in a case, forming a smoke-flue, as will be more clearly hereinafter shown by reference to the drawings, in which Figure 1 is a vertical section in line Z Z, Fig. 2, and Fig. 2 represents a horizontal section through line X X, Fig. 1, in which the tubes E are shown a little farther from the center of the boiler than in Fig. 1, their position not being material, as their object is merely to provide a communication between the two boilers.

A represents the outside case or shell; B, a O is the supplementary boiler. It is connected to the main boiler D by tubes E, and the flue F, between the two, is inclosed by a rim or shell, G, which surrounds it. i

H represents the opening through which the fuel is passed into the furnace. It is provided with the ordinary door H. I is the fire-chamber; I the grate, operated by the usual lever K. K is the ash-pit, also provided with the usual door.

The boiler D is provided with a series of tubes, J, of which there may be more or less than the number shown. They are covered at the top, so as to be water and steam tight,

and open at the bottom, so that the heated air can pass into them. They pass up into the water-space of the boiler, as shown, but not through it.

The tubes L, of which there may be more or less than the number shown, pass up from the lire-chamber and through the boiler D, and the tubes M pass from the top of the boiler down to the bottom.

The object of the tubes J is to distribute the heat through the water in the boiler D, while thctubes L carry orconduct it up through the boiler and against the horizontal surface of the supplementary boiler (J, and the object of the tubes M is to conduct the heat and pro ducts of combustion down through the boiler, and from thence up through the flue N, between the case or shell A and the boiler, and out through the smoke-stack. By this arrangement the heat, as it rises from the furnace, strikes first the top of the tire-chamber I, passes up into the tubes J at J, and up through the tubes L, where it strikes the lower or under surface of the boiler O, and then down and out, as before mentioned.

I claim as my invention- The boiler D, provided with a fire-chamber, I, within it, and having an opening to receive the fuel, and a supplementary boiler, (J, connected by tubes E, in combination with a series of tubes, L, through the crown-sheet and boiler for conducting the products of combustion up from the fire-chamber to a line or space, F, inclosed by a shell, G, to heat the supplementary boiler, and a series of tubes, M, for conducting the smoke and gases downward into the flue N and out, as described.

J. B. PIERCE;

Witnesses:

JAMES SANGSTER, HUGH SANGSTER. 

